diff options
Diffstat (limited to 'ext/standard/config.m4')
| -rw-r--r-- | ext/standard/config.m4 | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/ext/standard/config.m4 b/ext/standard/config.m4 index 9752ba0d42..d1c7cfd5a0 100644 --- a/ext/standard/config.m4 +++ b/ext/standard/config.m4 @@ -3,6 +3,57 @@ dnl $Id$ -*- sh -*- divert(3)dnl dnl +dnl Check if flush should be called explicitly after buffered io +dnl +AC_DEFUN(AC_FLUSH_IO,[ + AC_CACHE_CHECK([whether flush should be called explicitly after a bufferered io], ac_cv_flush_io,[ + AC_TRY_RUN( [ +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char **argv) +{ + char *filename = tmpnam(NULL); + char buffer[64]; + int result = 0; + + FILE *fp = fopen(filename, "wb"); + if (NULL == fp) + return 0; + fputs("line 1\n", fp); + fputs("line 2\n", fp); + fclose(fp); + + fp = fopen(filename, "rb+"); + if (NULL == fp) + return 0; + fgets(buffer, sizeof(buffer), fp); + fputs("line 3\n", fp); + rewind(fp); + fgets(buffer, sizeof(buffer), fp); + if (0 != strcmp(buffer, "line 1\n")) + result = 1; + fgets(buffer, sizeof(buffer), fp); + if (0 != strcmp(buffer, "line 3\n")) + result = 1; + fclose(fp); + unlink(filename); + + exit(result); +} +],[ + ac_cv_flush_io="no" +],[ + ac_cv_flush_io="yes" +],[ + ac_cv_flush_io="no" +])]) + if test "$ac_cv_flush_io" = "yes"; then + AC_DEFINE(HAVE_FLUSHIO, 1, [Define if flush should be called explicitly after a buffered io.]) + fi +]) + +dnl dnl Check for crypt() capabilities dnl AC_DEFUN(AC_CRYPT_CAP,[ @@ -143,6 +194,7 @@ AC_CHECK_LIB(pam, pam_start, [ AC_CHECK_FUNCS(getcwd getwd) AC_CRYPT_CAP +AC_FLUSH_IO divert(5)dnl |